Pin-locking means for clevises.



G, E. MILLS.. P'IN'lLDGKING MEANS FoPb GLEVISBS.

Ai-PLIOATION FILED FEB. 2G, 1909.

Patented Feb. 1, 1910.

g1/mentor,

@ a Zeig/772x276 l glzw@ GOULD E. MILLS, OF LAWRENCEVILLE, ILLINOIS.

PIN-LOCKING MEANS FOR CLEVISES.

To all whom it may concern:

Be it known that I, GoULD E. MILLS, a citizen of the United States,residing at Lawrenceville, in the county of Lawrence and State ofIllinois, have invented new and useful Improvements in Pin-Locking Meansfor Clevises, of which the following is a specification.

This invention is an improved interlock ing clevis in which the pin isprovided with a locking key for securely holding the pin to the yoke,the said key being pivoted to the pin whereby it may be moved at rightangles or moved in a plane with the pin, spring means being employed forexerting its tension against the spring whereby the key can beoperatively held at right angles to the pin and yieldingly engaged withthe lower arm of the yoke of the clevis, the said key being providedwith a major portion which extends beyond the end of the lower arm ofthe yoke when the key is in its operative position or in other wordswhen it is disposed at right angles to the pin, this construction beingsuch that the said major portion of the key may be grasped by the handand manipulated as a lever to move the pin against the tension of thesprino'.

It may also be stated that a still further object of the invention is toprovide the pin with a hand-engaging eye at its upper end which may beengaged by the left hand of the operator while the major portion of thekey is engaged by the right hand of the operator. Pressure may then beVapplied to both the hand-engaging eye and the said major portion of thekey and the spring may be accurately, eectively and quickly compressed.

In the accompanying drawings: Figure l is a sectional elevation of aclevis showing my improved locking pin applied thereto. Fig. 2 is an endelevation of the same.

The yoke l is provided at the inner ends of its arms with aliningvertical openings 2 for the reception of the pin 3. rlhe lower end ofthe pin 3 is provided with a centrally disposed downwardly openingvertical slot 4. At the upper end of the said pin is an eye 5 and anannular circumferential shoulder 6. On the upper portion of the pin is acoil extensile spring '7, the upper end of which is extended through anopening in the shoulder 6 and bent to -lie on the upper side of saidshoulder so as to attach said spring to said shoulder. The function ofthe said Specification of Letters Patent.

Application led February 20, 1909.

Patented Feb. 1, 1910.

Serial No. 479,042.

spring is to raise the pin 3 as will be understood.

A key S is pivoted in the lower portion of the slot- 4, the pivot 9 ofthe key being disposed near the center thereof. At the outer end of thekey is a knob l0 the diameter of which is somewhat less than that of thepin. This knob, as will be understood, forms a weight at one end of thekey. Vhen the key is disposed transversely with reference to the pinwhich bears against the under side of the yoke and hence prevents thepin from becoming' detached from the yoke, the spring by pushingupwardly on t-he pin causes the latter to keep the key in engagementwith the under side of the yoke. Wvhenever it is desired to detach thepin from the yoke, the pin must be first depressed against the pressureof the spring 7, whereupon owing to its weight knob 10 at one end thekey is automatically turned to al vertical position so as to dispose itsmajor portion within the slot 4 and the key then offers no obstructionand permits the pin to be readily drawn upwardly from the yoke. Byreason of the attachment of the upper end of the spring to the pin, thespring is prevented from becoming lost when the pin is removed. The keyis pivoted tothe pin 3 in such manner that the major portion 8 of thekey when in the full line position shown in Fig. 1 extends beyond theouter end of the lower arm of the yoke l, this construction being suolithat the said maj or portion of the key can be manipulated as a lever toforce the portion 8 of the key into engagement with the under surface ofthe lower arm of the yoke, the engagement of the key with the yoke asdescribed tending to compress the spring 7 to facilitate removal of thepin. The construction as just set forth is such that the key may besimultaneously actuated upon applying pressure to the pin from the eyeend 5 of the pin.

That is claimed is In a clevis, a yoke having a pair of spaced armswhose outer extremities are formed with alining passages, a pinremovably engaged in said passages and provided at one end with ahand-engaging eye and provided adjacent to the said eye with an annularshoulder, a spring surrounding a portion of the pin and engaged at oneend with the shoulder and at the other end with one arm of the yoke,said pin having its opposite end formed with a slot, and a locking keyeccentrically pivoted between the Walls of the Evin a direct-ion tocompress the spring and slot of the pin and adapted to be moved lcausing the key to be moved into a plane at right angles to the pin andto be yieldwith the pin to permit extraction of the ingly engaged withone arm of the yoke to y latter from the arms of the yoke. 5 hold thepin against removal, said key havl ing its maj or portion extendingbeyond one in presence of t-Wo Witnesses. end of one of the arms of theyoke and@ GOULD E. MILLS. adapted to be actuated as a lever to force theminor portion of the key into engagement 10 with one arm of the yoke tomove the pin i Vitnesses GEO. I-I. CUNNINGHAM, HARRY GRAY.

In testimony whereof I aiiiX my signature l

